Controlling dynamically loaded movie clips

Hi guys,

Im creating a booklet with turning pages, like the one previously posted, so all the content is loaded dynamically.
On the right hand page i have text, of which some lines are interactive.
On the left page, i have a hidden text box. When the user clicks on a certain line on the right page, the text box on the left page becomes visible, and the relevant txt is loaded into the text box.

Now, i can make the text box on the left page invisible by placing _visible = 0; directly into the actionscript pane of the text box.
What i cant do is make it visible by clicking on the right page text.

Where should i put the code to make the text box visible?
Is it as simple as movieClip._visible = 1; ?

Im really sorry if that doesnt make much sense, it seems like a simple enough problem but not being able to crack it is making me kinda frantic.

Thanx a lot in advance,